Polishing copper rollers



Nov; 30 1926.

J. C. MONTGOMERIE ET AL POLISHING COPPER ROLLERS Filed Jan. 16. 1923' 6Sheets-Shem; 1

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Nov. 30 1926.

J. C. MONTGOMERIE ET AL POLISHING COPPER ROLLERS 6 Sheets-Sheet FiledJan. 16 lQZE 'Nov. 30 1926.

J. C. MONTGOMERIE El AL POLISHING COPPER ROLLERS Filed Jan. 16. 1923 6Shegts-Sheqt 4- Nov. 30 1926.

Y J. c. MONTGOMERIE ET AL POLI SHING COPPER ROLLERS Filed Jan. 16. 19236 Shegts-Sheet 5 1 INVENQTORS.

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Nov. "30 1926.

J. c. MONTGOMERIE ETAL POLISHING COPPER ROLLERS Filed Jan. 16, 1923 6Sheets-Sheet 6 q z fIIIITIILIIIIIIlllllrllllllll 1| l\ IL fnvenfons.

f7"? 42am Patented Nov. 30, 1926.

UNITED STATES PATENT OFFICE.

JOHN CUNINGH-AME MONTGOMERIE, OF STAIR, AND WILLIAM STEWART, F AYR,SCOTLAND.

POLISHING COFFEE ROLLER-S.

Application filed January 16, 1923, Serial No. 613,061, and in GermanyJ'une 2, 1922.

This invention relates to improved means adapted for use in polishingcopper rollers, and has for its objects to enable rollers varyingconsiderably in length to be treated in thesame machine, to ensureuniform distribution of the wear over the whole working surface of thepolishing stone, and to prevent grit or the like from adhering to theface of the latter or to the roller surface under treat ment.

In the accompanying drawings, Fig. 1 is a front elevation ilustrating amachine constructed according to our invention, whilst Fig. 2 is acorresponding plan. Fig. 3 is an end elevation, taken from the left-handend in Fig. 2, whilst Fig. 4 is a detail view, drawn partly in sectionand to a larger scale, illustrat-ing the construction of thestone-carrier hereinafter described. 'Fig. 5 is a longitudinal verticalsection in the plane of the stone traversing shaft; and Figs. 6 and 7are transverse vertical sections in the plane of the stone-carrier. InFig. 8 is illustrated in side elevation an optional addition wherein apartial rotarymoveinent is imparted to the stone.

Apparatus constructed according to our invention comprises two or morebase-frames a supporting a bed a similar in form to that of a lathe andsecurely bolted to the frames. Toward the rear extremities of the latterare mounted standards 5 6, adapted to support the polishing stone 0, itscarrier 0 guide-bars aZ, d, and mechanism for traversing thestonecarri-er along the latter. The brackets b, b, are united by anoverhead tie-plate b carrying apair of spindles e, e, whereon are freelymounted pulleys e (2 carrying the rope of a counter-weight f. (See- Fig.3.) Guidebars .(Z (Z are connected at their extremities to the standards6, b, and on these guidebars is mounted a frame (Z which may be adjustedangularly in the radial slots (Z (Z (See Fig. 1.)

'Upon the bed a are arranged bearings a a embodying adjustable conicalbushes adapted to gripthe inandril or shaft of the copper roller 9, eventhough worn; the exterior of the bushes being of cylindrical form 50 andmaking a running fit in the bearings a a wherewith the roller isconsequently maintained true.

The copper roller 9 is driven from the lefthand side of the apparatusillustrated in Fig.

1 by Way of a flexible coupling 9 whereof the driving member is keyedupon the driving spindle which carries the three-step cone 9 the latterenabling the roller to be driven at three different speeds. More stepsmay be arranged on the cone g as special requirements may dictate. Thedriving spindle is carried in a separate casting g bolted to theleft-hand extremity of the bed a? The polishing stone 0 and its carrier0 are hereinafter described and are illustrated more clearly in Figs. 3and 4. The carrier 0 is driven by means of a reversible driving screw]L, which engages the driving nut h The latter moves along theguide-bars d, d,

which lie between, and are attached to, the

brackets b, b; and to the driving nut 7&1 is attached a verticaltravelling guide-bar ]L2. The carrier 0 is free to move up and down uponthis latter; but the travelling guidebar 71 thrusts the carrier 0longitudinally from right to left and from leftto right. At the top ofthe travelling guide-bar [L2 is fitted a half-moon-shaped slipper Z1which works along the travelling guide-steady-bar h the latter beingattached to the brackets At the left-hand end of the driving screw it ismounted a bevel pinion Zr, which gears alternately with the pinions and70 (see Fig. 2) according as they are respectively engaged by thedriving clutch 70 The latter is keyed upon the driving shaft Zr, whereonthe pinions 7:1 and 70 are free to revolve until engaged by the clutch70. T0- ward the outer extremity of the driving shaft it, is fixed themain driving pulley The clutch Z0 is operated by means of automaticstops Z, Z, carried by a rod Z these stops being adjust-able as regardstheir position along the latter in such manner as to suit any givenlength of copper roller within the range of the machine.

In reversing the traverse of the stonecarrier 0 the mode of operation isas follows :\Vhen the driving screw nut h makes contact with either ofthe automatic stops Z, Z, (see Fig. 2) the rod Z is movedlongitudinally, and this motion is transmitted to the reversing lever Zwhich in turn moves the clutch rod Z3", either forwards or rearwardly,and so engages the clutch 713 with either the pinion s or the pinion 70The arms of the reversing lever Z may be in the ratio of 2 to 1 or 3 to1 so that a very slight movement of the rod Z will engage the clutch 74fully and almost instantaneously with one of the pinions Z of k At theright hand end of the driving screw h, is provided a hand-wheel it foruse in rotating the driving screw it when setting the machine at thecommencement of its work, or after changing a stone, or for op- Hcrating the stone-carrier c by hand at any time. This hand-wheel isprovided with a friction-nut h which, when screwed home, locks thehand-wheel in gear; but when the friction-nut is slackened back, thehandwheel is free and idle, this being the con and the guide-bars (Z, d.

slots in the frames 7), b.

I? ed to hold the stone 0.

As illustrated in Figs. 8 and l, the st0necarrier 0 comprises a maincasting, at one extremity of which is formed an elongated boss 0 throughwhich passes the travelling guide if; the boss 0 being made sufficientlylong to ensure steadiness. The central portion of the casting iscylindrical and carries a freely revolving ring 0 Between the flanges ofthis ring the guide-bars (Z, d, bear, and thus a very easy motion isobtained, as the ring is free to-revolve both round the main casting andalong the guide-bars d, d. The other end of the casting is in the formof a square flange to which is bolted a coverplate 0 adapted to retainin position a worm-wheel m. This Wheel is internally screw-threaded andengages with a screwthread formed upon the sliding sleeve m to which isattached a chuck or grip n adapt- The chuck n as t o jaws operated by aright and left hand screwthreaded spindle p. The back of the chuck isformed with a stem 1? which is free to revolve inside the sleeve m andalso to partake of a limited longitudinal movement therein. Between theend of the stem n and a plug 9, arranged in the upper part of the sleevem is placed a spring 3. The worm-wheel m is rotated by means of aworm-wheel shaft 2, operated by means of a hand-wheel '0.

The action of the stone-carrier is as follows :-As the latter traversesthe roller along the guide-bars d, cl, the revolving ring 0 rotates onthe body of the carrier, and the stone 0 may be advanced or retracted byrotating the hand-wheel o. The latter is attached to the worm-shaft twhich drives the worm-wheel m, which in turn advances or retracts thesleeve m according to the direction in which the hand-wheel is rotated.The clearance space between the sleeve m and the chuck n is designed topermit the required compression of the spring 8.

When the hand-wheelo is rotated until the stone 0 is brought intocontact with the copper roller, a few extra turns are given with theeffect that the clearance space is decreased and the spring 8 iscompressed in a certain degree. Such compression ensures an evenpressure being exerted by'the stone upon the roller throughout its work,and also provides for the taking up of any Wear of the stone.

The copper roller having been placed in position and the stone grippedin the carrier, the guide-bar-frame is then set according to the variouswidths of stones used. The stone is then moved along to the extremeleft-hand end of the roller; and in that position, the bottom edge ofthe stone should lie in exactly the same horizontal plane as the axis ofthe roller. A few tu'rns'of the hand-wheel on the carrier will establishthe desired pressure of the stone against the roller. hen the stonearrives at the righthand end of the roller, the top edge of the stoneshould lie in exactlythe same horizontal plane as the axis of theroller. Thus, in each traverse movement of the stone from right to left,or from left to ri ht. along the roller, the stone also movesverticallv, the whole surface of the stone is uniformly exposed to thesame pressure and the wear evenly distributed. The contact of the stonewith the roller is only a line contact at'any time, and thus the risk ofgrit becomin at tached to either the roller or the face of the stone ispractically obviated.

A water service may be arranged to play upon the face ofthe stone androller; the bed a forming a tank or container for the water. Splashguards (not shown) may moreover be attached to the bed a or form part ofthe casting of the bed.

According to the construction illustrated in Fig. 8, the main body ofthe stone-carrier c is free to rotate in relation to its rearwardportion traversed by the vertical guide-bar 7L2 and is formed withperipheral chases c adapted to engage intermittent ribs or teeth 0mounted upon the guide-bars d as indicated in dotted line in Fig. 1, thechases o alternately engaging with the ribs or teeth 0 carried by therespective guide-bars d d. A reciprocating partial rotary movement ofthe stone is thus effected as the latter passes to and fro along theguide-bars (Z. The employment of the additional mechanism here referredto is however optional, as we do not regard it as essential that thepolishing stone should partake of any such oscillatory movement as ishere provided for.

We claim 1. In a machine for polishing copper rollers, the combination,with guide-bars arrange in a vertical plane parallel with the axis ofthe roller but in a direction oblique thereto and a stone-carriermounted in said guide-bars, of frames to which the opposite extremitiesof said guidebars are attached, and said frames comprising fixed slottedguides wherein said extremities of said guide-bars are adjust-ablymounted.

2. In a machine for polishing copper rollers,'a bi-part stone carrier,one part adapted to engage the stone and rotatably mounted in the otherpart, said first part having peripheral chases, means for moving thestone carrier longitudinally of the roller, said other part having guidebars supporting the stone carrier and having spaced teeth to engage saidchases to impart an oscillatory movement to the stone carrier during itslongitudinal travel.

3. In a machine for polishing copper rollers, means for rotatablysupporting a roller, a stone carrier, a pair of guides for said stonecarrier, means for supporting the guides at various angles across thehorizontal plane of the axis of the roller for shifting the stonecarrier vertically when the latter is moved lengthwise of the guides, adevice for shifting the stone carrier longitudinally, having avertically slidahle connection between said device and the stone carrierfor permitting vertical movement of the stone carrier.

JOHN C. MONTGOMEBIE. WILLIAM STEWART.

